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[OM] Light loss from extension

Subject: [OM] Light loss from extension
From: usher99@xxxxxxx
Date: Wed, 07 Dec 2005 17:20:17 -0500
Hi,
Performed procedure suggested by Chuck a few weeks ago--steady light on 
interior wall.  Best estimate with OM-2 meter.
 
50 mm Macro/3,5   at 1/2 Mag  -2/3 stop   (Due to extension in the lens itself).
                              1/4 Mag  -1/3  stop
                              1/6 Mag   -1/3 stop
                          <= 1/8 Mag      0
 
 
Tamron SP BBAR 2X  TC  -1 stop  no surprise
Tokina  2X TC   4 element    -2/3  stop   Hmmm
 
25 mm Ext tube  -2/3 stop
 
 
More to go,
Mike
PS
Maybe I will be able to consistent  non-TTL Macro  flash fill in this lifetime.
 


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